IT support and desktop support interview questions and answers
Desktop and IT support interviews are practical: troubleshooting networks, PCs and printers, user accounts and security, and explaining fixes to non-technical people.
12 questions. Read each one, start the timer and answer out loud as if you were in the room, then open the tip. Nothing is recorded.
A user says the internet is not working. How do you troubleshoot?
What a good answer covers
Check the cable or Wi-Fi, other devices, ipconfig, ping the gateway and a public IP, check DNS, restart the router, then call the ISP.
What are DHCP and DNS?
What a good answer covers
DHCP gives devices an IP address automatically. DNS turns names like egig.in into IP addresses.
What is the difference between a hub, a switch and a router?
What a good answer covers
A hub sends data to every port, a switch sends it to the right device, a router connects different networks.
How do you fix a slow computer?
What a good answer covers
Check startup apps, disk space, malware, RAM use and updates. An SSD upgrade often helps most.
What is Active Directory?
What a good answer covers
A Windows directory of users, computers and groups for domain logins, permissions and policies.
A printer won’t print. What do you check?
What a good answer covers
Power and connection, the print queue, paper and toner, the driver, then restart the spooler.
What is the difference between IPv4 and IPv6?
What a good answer covers
IPv4 uses 32-bit addresses and is running out. IPv6 uses 128-bit addresses.
How do you prioritise tickets?
What a good answer covers
By impact and urgency, within the SLA. Something that stops many users comes first.
How do you reinstall Windows safely?
What a good answer covers
Back up the user’s data first, note licences and software, install, update, then restore data and settings.
What is a VPN?
What a good answer covers
An encrypted tunnel over the internet that lets remote users reach the office network safely.
How do you protect users from phishing and malware?
What a good answer covers
Updates, antivirus, email filtering, two-step login, and teaching users to check links and senders.
How do you explain a technical fix to a non-technical user?
What a good answer covers
Simple words, what went wrong, what you did and what they should do next time.
All 12 questions with answers
1. A user says the internet is not working. How do you troubleshoot?
Check the cable or Wi-Fi, other devices, ipconfig, ping the gateway and a public IP, check DNS, restart the router, then call the ISP.
2. What are DHCP and DNS?
DHCP gives devices an IP address automatically. DNS turns names like egig.in into IP addresses.
3. What is the difference between a hub, a switch and a router?
A hub sends data to every port, a switch sends it to the right device, a router connects different networks.
4. How do you fix a slow computer?
Check startup apps, disk space, malware, RAM use and updates. An SSD upgrade often helps most.
5. What is Active Directory?
A Windows directory of users, computers and groups for domain logins, permissions and policies.
6. A printer won’t print. What do you check?
Power and connection, the print queue, paper and toner, the driver, then restart the spooler.
7. What is the difference between IPv4 and IPv6?
IPv4 uses 32-bit addresses and is running out. IPv6 uses 128-bit addresses.
8. How do you prioritise tickets?
By impact and urgency, within the SLA. Something that stops many users comes first.
9. How do you reinstall Windows safely?
Back up the user’s data first, note licences and software, install, update, then restore data and settings.
10. What is a VPN?
An encrypted tunnel over the internet that lets remote users reach the office network safely.
11. How do you protect users from phishing and malware?
Updates, antivirus, email filtering, two-step login, and teaching users to check links and senders.
12. How do you explain a technical fix to a non-technical user?
Simple words, what went wrong, what you did and what they should do next time.
Before the interview
- Read the job description twice and match two of your examples to what it asks for.
- Keep printed copies of your resume, ID proof and certificates ready, even for online rounds.
- Know your current CTC, expected salary and notice period. Check typical pay in our salary guide, and compare offers with the in-hand salary calculator.
- Genuine employers never ask you to pay for an interview, training kit or joining. Report anyone who does.